For the cost function C(x), find the marginal cost at the given production level x. Round your answer to two decimal places.
?
?
A. $19.62 per item
B. $21.28 per item
C. $9.61 per item
D. $19.60 per item
E. $15.00 per item
Answer: D
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 0 for r(t) = t2i + (10t3 - 6)j + 
k
A. a(0) = 2i - 
k
B. a(0) = 2i - 
k
C. a(0) = 2i - 
k
D. a(0) = 2i + 
k
Simplify the given expression. Write the answer with variables in alphabetical order and any constant term last.-6b + 4a - 5c - 2b + 2a
A. 2a - 8b - 5c B. cannot be simplified C. 6a - 8b D. 6a - 8b - 5c
Solve the problem.Elaine had 38 buttons. Her grandmother donated 5 cards of buttons to the collection. Elaine sorted the buttons into 7 piles, putting 9 buttons in each pile. How many buttons were on each card from Elaine's grandmother?
A. 36 buttons B. 58 buttons C. 5 buttons D. 61 buttons
Subtract.- 
A. 1986.04323 B. 1986.04223 C. 1986.04233 D. 1986.04224